Hiram a



(No Model.)

H. A. FOSTER. SPINDLE FOR LOOM SHUTTLES.

.No. 515,206. Patented Feb. 20, 1894.

witnesses; 3mm:

I 71 MGM WQMezaz/Q UNITED STATES PATENT Prion.

HIRAM A. FOSTER, OF LOWELL, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TOEDWARD IV. THOMAS, OF SAME PLACE.

SPINDLE FOR LOOM-SHUTTLES.

SPECIFICATION forming part of Letters Patent No. 515,206, dated February20,1894.

Application filed July 12, 1893.

To all whom it may concern:

Be it known that I, HIRAM A. FOSTER, a citizen of the United States,residing at Lowell, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful. Improvements inSpindles for Loom- Shuttles, of which the following is aspecification,.reference being had therein to the accompanying drawing.

My invention relates to spindles for loom shuttles.

' It has for its object to provide a spindle of simple, durable, andefficient character and construction, which shall admit of being cheaplyand economically made, and which shall obviate various objectionsappearing in practice to the ordinary split spring shuttlespindle now ingeneral use. The said split spring spindle normally expands so as thatits parts are spread apart to their fullest extent, and when thusexpanded the resistance which the said parts of the spindle oppose tothe pressure which tends to bear them toward each other, causes thespindle to offer considerable resistance to the slipping of a cop ofyarn thereon, and necessitates the exertion of considerable force inperforming this act. The endeavor to place a cop upon the said spindleresults sometimes in breakage of the cop, and often in disarrangement ofthe coils of yarn composing the same, which are disadvantageous, as iswell known to those skilled in the art. In addition, notwithstandingthis resistance which the split spindle offers when it is sought to makeapplication of a cop thereto, the said split spindle often fails toexert sufficient pressure against the interior of the cop when thelatter has been pushed fully onto the spindle, to enable the spindle tosecurely retain the cop in place upon itself, and hence it frequentlyhappens that in practice, during weaving the cop becomes loosened anddislodged from the said spindle in consequence of the shocks and 5 blowsreceived by the shuttle, and when thus dislodged passes into the throatof the shuttle-body. These objections are obviated by the improvedshuttle spindle embodying my Serial No. 480.250- (No model.)

invention, which I now shall proceed to describe with reference to theaccompanying 5o drawing, which latter is a view of the said spindle inelevation.

In the drawing, the usual head of the spindle is shown at 1, and theblade thereof at 2. The said blade is made solid, and, also, it is madeof tapering form from the head-end thereof to the tip 3, as shown, inorder to facilitate its introduction into the hole at the center of thecop. On the exterior of the said tapering blade, I provide or form aretaining spiral 4, which is intended to engage with the interior coilsof yarn composing the cop. Preferably,this retaining spiral is producedby forming a spiral groove in the exterior of the spindle-blade asshown. The interior coils of yarn at the cop sink into this groove, aswill be readily understood. The side of the groove which is toward thetip of the spindle, which side for convenience may be termed the forwardside, may, with advantage, be formed as shown to extend radially, orsubstantially so, outward from the bottom of the groove. This increasesthe hold upon the cop. The other side may be made to slope, as shown, tofacilitate the entrance of the coils of yarn into the groove. The spiralretainer is not, in itself, adequate to completely guard against thedislodgment' of the cop, and if used alone will permit the cop to passgradually along the spindle toward the tip of the latter, until itbecomes loosened sufficiently to become dislodged as hereinbeforementioned. I therefore provide at intervals on the spindle-blade,transversely extending checks 6 in the form of lateral brakes in thespiral course of the forward wall of the groove. These lateral brakesform shoulders at right angles to the length of the spindle, and prevententirely the endwise movement of the cop that the spiral retainer oth-9o erwise would allow.

The spiral retainer is important and valu able inasmuch as it secures acontinuity of engagement with the interior of the cop, and the checks orlateral brakes located at inter- 5 vals in the length of the spiralretainer cooperate therewith to resist the tendency to movement stillpermitted by the spiral retainer.

I claim as my invention- 1. The spindle for loom shuttles, having aspiral retainer for the cop, and transversely extending checks locatedat intervals on the spindle-blade, substantially as described.

2. The spindle for loom shuttles, having a spiral retainer produced by agroove extending spirally around the spindle-blade and also transverselyextending checks located at intervals on the spindle-blade,substantially as described.

3. The spindle for loom-shuttles having a spiral retainer produced by agroove extending spirally around the spindle-blade, and

also checks extending transversely from said spiral retainer at rightangles to the length of the spindle, substantially as described.

4. The solid spindle for loom-shuttles having a spiral retainer producedby agroove extending spirally around the spindle-blade with the forwardside of the said groove substantially radial as shown, and also havingchecks extending transversely from said spiral retainer at right anglesto the length of the spindle, substantially as described.

In testimony whereof I affix my signaturein presence of two witnesses.

HIRAM A. FOSTER.

Witnesses:

CHARLES MEVIS, GEORGE W. POORE.

